Control equipment for controlling drill rod
a technology of control equipment and drill rod, which is applied in the direction of drilling rods, drilling pipes, drilling casings, etc., can solve the problems of unreliability of device work, increased equipment weight, unnecessary friction and wear, etc., and achieves the effect of reducing the weight of the control equipment and being convenient to us
Active Publication Date: 2015-11-24
SANDVIK MINING & CONSTR OY
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- Description
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- Application Information
AI Technical Summary
Benefits of technology
This solution simplifies operation, reduces equipment weight, and ensures reliable guidance of drill rods of varying diameters with reduced friction and wear, allowing for efficient use of a single pair of guide jaws across different diameters.
Problems solved by technology
Further, the use of double devices increases the weight of the equipment, and in particular in a location disadvantageous to the equipment, i.e. at the end of a feed device.
This device works unreliably to some extent, because the guide jaws may move differently, and there is no certainty whatsoever about the actual position of the guide jaws.
In addition, in the solution of the publication the guide jaws in the guide position are in continuous contact with the drill rod, which causes unnecessary friction and wear.
Method used
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[0012]FIG. 1 shows schematically a drilling rig, which comprises a carrier 1, to which is connected a boom 2. To the boom 2, in turn, is mounted a feed beam 3 on which a drilling machine 4 moves. To the drilling machine 4, in turn, is coupled a drill rod 5, and at the lower end of the feed beam 3 there is control equipment 6 for guiding the drill rod 5.
[0013]FIGS. 2a and 2b are schematic perspective views of the control equipment according to the invention. The control equipment 6 includes a frame 7 and two opposing guide jaws 8a and 8b which are mounted to move linearly in relation to the frame 7 and which are coupled to move on either side of the drill rod 5 in transversal direction thereto. For moving the guide jaws, the control equipment 6 comprises actuators 9, in this case hydraulic cylinders on either side of the guide jaws 8a and 8b, so that a symmetrical force is exerted on the guide jaws. Each guide jaw 8a and 8b comprises a guide surface 8a′ and 8b′, respectively, which c...
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Control equipment for guiding a drill rod. The control equipment including a frame and two guide jaws provided with guide surfaces and mounted movably in relation to the frame. The drill rod is set between the guide jaws during drilling. Actuators move the guide jaws in relation to the drill rod. Synchronization means are coupled between the guide jaws, such that the guide jaws always move in opposite directions to one another and at the same speed. A detector detects that the guide surfaces of the guide jaws are in contact with the drill rod.
Description
RELATED APPLICATION DATA[0001]This application is a §371 National Stage Application of PCT International Application No. PCT / FI2012 / 050150 filed Feb. 16, 2012 claiming priority of Finnish Application No. 20115158, filed Feb. 18, 2011.BACKGROUND OF THE INVENTION[0002]The invention relates to control equipment for guiding a drill rod, the control equipment comprising a frame, two guide jaws provided with guide surfaces and mounted to be linearly movable in relation to the frame, between which guide jaws the drill rod is to be set during drilling, and actuators for moving the guide jaws transversely to the drill rod axis for moving them away from one another, and correspondingly, towards one another in order for guiding the drill rod.[0003]Drilling rigs often employ drill rods of different diameters, typically two different drill rods. During drilling the drill rods must be guided and for that there are typically employed two separate controllers, i.e. one for each rod diameter. Each g...
Claims
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IPC IPC(8): E21B19/24
CPCE21B19/24
Inventor TIENARI, OSSI
Owner SANDVIK MINING & CONSTR OY